In 1999 Invitrogen of Carlsbad, Calif., unveiled its Flp-In™ recombinase-based system as a solution to these problems, says Kerry Lowrie, product manager of mammalian gene-expression products.

but also control where and when such recombination occurs by dictating the expression pattern of the FLP or Cre recombinase. Cajal, S. R. Histology of the Nervous System of Man and Vertebrates ...